Eminem is a walking contradiction, at once meticulous and utterly messy, both in character and in lyric. His politics are complicated, his rhymes often puzzling. The illustrious Marshall Mathers has without a doubt left behind a prickly portfolio that ranges from aggravating dark male anger to poppy bops to at times mind-bending twists of verse. He is, by most measures, one of the greatest and most problematic hip-hop artists of his era. Eminem has since more or less fallen out of the zeitgeist, nowadays reserved for workout playlists and the occasional surprise appearance on shuffle.